Thinking about what happened to me yesterday while answering a question, I was wondering whether the following would be considered acceptable for MsE policy or not.
Suppose that user A (the OP) asks a question and that user B answers it. Then, user A comments user B's answer and, looking for clarifications, he or she asks another question (I will call it CQ, "commented question") which is related to the original one, but has its own right to be considered even without the reference to the starting question. User B knows the answer to CQ and gives it in another comment, following the previous comment by the OP, user A.
Now, the point is: if user B deems CQ an interesting question, whose solution might prove useful also for someone else or for future references, is he or she allowed to ask CQ as an official question and then self-answer to it?
Thank you for your advice!